Typewriting machines – Typing by other than type-face or type-die – Character formation by impact
Patent
1986-07-25
1987-07-21
Sewell, Paul T.
Typewriting machines
Typing by other than type-face or type-die
Character formation by impact
101 9305, 400121, 335282, B41J 310
Patent
active
046814671
ABSTRACT:
A print actuator for dot matrix applications having a stator with a coil wrapped thereon and constrained by the walls of the stator. An armature extends above the stator in a cantilever or pivoted manner. The armature controls movement of a print element. The magnetic flux path extends transversely through the width of the armature and the periphery of the stator at walls supporting the armature. Multiple armatures are included in a common armature plate. Twin multi-coil stators are mounted for operation of the armatures on the plate. The stators have magnetic stator sections adjacent the armatures, and have non-magnetic heat-dissipating stator sections remote from the armatures. In its cocked position, the armature is flexed to a profile which optimizes armature dynamics, such as a profile similar to the first bending mode.
REFERENCES:
patent: 2099997 (1937-11-01), Benecke
patent: 3138427 (1964-06-01), Stein
patent: 3973661 (1976-08-01), De Boo
patent: 4368353 (1983-01-01), Ando
patent: 4396304 (1983-08-01), Davenport
patent: 4407591 (1983-10-01), Adamoli
patent: 4411538 (1983-10-01), Asano
patent: 4449836 (1984-05-01), Yamada
patent: 4527469 (1985-07-01), Wolf
IBM Tech. Disc. Bulletin, by W. Hasler, vol. 25, No. 9, Feb. 1983, pp. 4901-4902.
International Business Machinces Corporation
Sewell Paul T.
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